CN101818354B - Water electrolysis system of solid polymer electrolyte - Google Patents
Water electrolysis system of solid polymer electrolyte Download PDFInfo
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- CN101818354B CN101818354B CN200910118664A CN200910118664A CN101818354B CN 101818354 B CN101818354 B CN 101818354B CN 200910118664 A CN200910118664 A CN 200910118664A CN 200910118664 A CN200910118664 A CN 200910118664A CN 101818354 B CN101818354 B CN 101818354B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 223
- 229910001868 water Inorganic materials 0.000 title claims abstract description 222
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 126
- 239000007787 solid Substances 0.000 title claims abstract description 9
- 239000005518 polymer electrolyte Substances 0.000 title claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 69
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 69
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 68
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000001301 oxygen Substances 0.000 claims abstract description 45
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 8
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- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 6
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- -1 metals ion Chemical class 0.000 description 2
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention provides a water electrolysis system of solid polymer electrolyte SPE (Solid Polymer Electrolyte), solving the problem of tedious production manufacture and maintenance of an SPE water electrolysis system in the prior art. The SPE water electrolysis system comprises a water supply device and an electrolyzer, wherein the water supply device is used for supplying water to an electrolysis water inlet of the electrolyzer through a self electrolysis water outlet and receiving and storing water drained from the self electrolysis water outlet of the electrolyzer through a self condensed water return hole; and the electrolyzer is used for electrolyzing the water in a power supply state to generate hydrogen and oxygen and draining moisture in the hydrogen and the oxygen. The SPE water electrolysis system is easier to realize production and manufacture and is convenient to repair and maintain when each module has a fault or is abnormal.
Description
Technical field
The present invention relates to electrochemical field, relate to a kind of water electrolysis system of solid polymer electrolyte especially.
Background technology
Energy dilemma and environmental pollution are increasingly serious, Renewable Energy Development, walk the focus that sustainable development path becomes present research.Hydrogen Energy has that energy density is big, utilising efficiency is high, to zero environmental, a series of outstanding advantages such as applied widely, be called as one of optimal substitute energy of 21 century.But the existence of tellurian natural hydrogen is few, and traditional fossil energy hydrogen production process also can bring by product such as CO when consuming Nonrenewable energy resources
2Deng, and water is inexhaustible raw material, therefore, in the long run, utilizing with water is that to produce hydrogen be comparatively desirable method to raw material.Thermochemistry and photochemistry hydrogen manufacturing also do not have the possibility that mass-producing and civil nature are produced from present's view, and utilize electric energy to carry out the method large-scale production of water electrolysis hydrogen producing.The power consumption of traditional alkaline electrolyte water electrolysis technology is big, and effciency of energy transfer is merely 50-60% (by the hydrogen low heat value), and installs hugely, and work-ing life is short.The water electrolysis technology has the current density height to the new solid polymer SPE (Solid Polymer Electrolyte) that rises, electrolytic efficiency is high, safe and reliable, gas purity is high, long service life, bigger throughput and many advantages such as system process of simplification; And become the object that each country falls over each other to study, developed some kinds of SPE water electrolysis systems at present in the world.
In existing SPE water electrolysis system, be to reduce the expense of explosion-proof equipment, WO9957335 electric power supply system with produce hydrogen/, proposed a kind of purging system with the isolating while of hydrogen system.It is medium that this purging system adopts gas; Guarantee the certain positive pressure of the inner maintenance of electric power supply system; Like 0.1 inch of water, reaching the purpose that safety and used heat utilize, and can avoid electric power supply system and produce hydrogen/use the cost problem that explosion-proof equipment brings with hydrogen system.Simultaneously this patent also propose with gas-drying system with produce hydrogen/separate with hydrogen system, adopt explosion-proof equipment according to the relevant criterion gas-drying system, and with electric power supply system with produce hydrogen/adopt dividing plate to separate with hydrogen system.The SPE water electrolysis system of this structure is not easy to manufacture, and is also more loaded down with trivial details when safeguarding.
In the SPE water electrolysis system that patent US0215680 proposes; Power-supply system is made up of split, removable supply module and electrolyzer; Each module all is positioned in the casing; This casing has a communication port of handling hazardous condition, and this communication port has the multiple unit that is used to control the safe operation of power-supply system.Because there is system with more electrolyzer inside in the SPE water electrolysis system, so the manufacture difficulty of this electrolyzer is bigger, and because system complex is difficult to guarantee its explosion-proof performance.
WO057686A2 has proposed a kind of steam iron generator system and has realized the method for this system.This patent points out that this system is made up of three parts: a plurality of isolating electrochemical cell heap (electrolyzer), oxygen water management systems, hydrogen water management system etc.This patent adopts power supply system to separate design with electrolytic system; And be provided with purging system in the electrolytic system outside; This patent proposes to purge the fan that adopts window interior the fresh air of outside is blown near the electrolyzer; Discharge through another window afterwards, purpose is for oxygen of discharging the discharge of oxygen water management system and hydrogen water management system possibility leakage hydrogen gas, and near the window of giving vent to anger, settles combustible gas sensor; Simultaneously gas sensor is set with power-supply system realizes chain control, assurance safety in internal system.The mode of this employing ventilation window and fan ventilation only is applicable to that steam iron generator has no under the situation of inflammable gas on every side, and therefore, the explosion-proof performance that can reach is still not good enough.
In the SPE water electrolysis system that CN200710088059.0 proposes in the multi-electrode electrolysis process; Set of systems becomes electrolysis electrode system, gas delivery system, gas treating system, power supply and power control system, retaining and water treatment purification system, water supply and water exhaust system; Electrolyzer adopts parallel way in this electrolysis process, and water supply and exhaust all adopt single pipeline to gather into the overall pipeline mode of common.Some is used for the heating to electrolysis electrode in the power supply in this system; This kind measure is applicable to the steam iron generator of low current density work; When current density was big, the SPE water electrolysis system did not need hot spots, needed heat-removal system to guarantee the temperature operation of electrolytic system on the contrary; So the temperature measure of control effect of this scheme is limited, be not suitable for the electrolytic system of big electric current.
To sum up, existing SPE water electrolysis system exists the weak point that the manufacturing is comparatively difficult, maintenance is comparatively loaded down with trivial details and explosion-proof performance is not good enough, temperature measure of control effect is limited, therefore needs a kind of New type of S PE water electrolysis system.
Summary of the invention
Main purpose of the present invention provides a kind of SPE water electrolysis system, with the problem that the manufacturing is comparatively difficult, maintenance is comparatively loaded down with trivial details and explosion-proof performance is not good enough, the temperature measure of control are limited that solves SPE water electrolysis system in the prior art.
For addressing the above problem, the present invention provides following technical scheme:
A kind of solid polymer electrolyte SPE water electrolysis system comprises water supply installation and electrolyzer, and this water supply installation and electrolyzer are in the integral sealing structure separately respectively or place same integral sealing structure:
Water supply installation is used for through self electrolysis water water outlet to the electrolysis water water inlet of said electrolyzer supply electrolysis water, and receives and store the water that said electrolyzer is discharged from self brine electrolysis water outlet through self condensate return mouth;
Electrolyzer is used under power supply state, said electrolysis water being carried out the moisture that electrolysis produces hydrogen and oxygen and discharges said hydrogen and oxygen.
Said water supply installation and electrolyzer are in respectively in the integral sealing structure separately.
Described SPE water electrolysis system further comprises gas-cleaning installation, is used to purify hydrogen and the oxygen that said electrolyzer produces.
Be provided with condensing water conduit between said gas-cleaning installation and the said water supply installation, be used for the water that hydrogen and/or oxygen condensation obtain is imported said water supply installation; And comprise water correction plant in the said water supply installation, the water that is used for that said condensation is obtained purifies and becomes the electrolysis water.
Described SPE water electrolysis system further comprises blow device and electric supply installation, wherein,
Said blow device is used in said integral sealing structure, feeding sweeping gas;
The electric energy formal transformation that said electric supply installation is used for SPE water electrolysis system power supply is to meet the required electric energy form of said SPE water electrolysis system.
Said electrolyzer inside or periphery have heat exchange pipeline, and this heat exchange pipeline is used to feed water, hydrogen or oxygen.
The inside or the periphery of said water supply installation have heat-exchanger rig, and this heat-exchanger rig is used for water supply installation and extraneous heat exchange, and heat transferring medium is water, hydrogen or oxygen.
Said gas-cleaning installation is further used for the heat exchange between the hydrogen that electrolysis water and electrolysis produce.
A kind of control method is applied to comprise in the SPE water electrolysis system of said water supply installation, electrolyzer, gas-cleaning installation, blow device and electric supply installation, comprises the steps:
Detect the concentration of inflammable gas in one to four kind of device space of living in water supply installation, electrolyzer, gas-cleaning installation, the electric supply installation;
The concentration of confirming inflammable gas in said electrolyzer or the gas-cleaning installation has reached the time span of setting greater than the time of set(ting)value and this state continuance, starts said blow device then device preset in the said SPE water electrolysis system is purged.
According to technical scheme of the present invention, adopt modular construction in the SPE water electrolysis system, reduced system complexity, make that this system is easy to realize manufacturing, and help when each module breaks down or be unusual, to carry out localization of fault.The closed structure of each module makes the safety detection of inflammable gas be more prone to accurate, and helps to purge the raising of efficient, thereby has improved explosion-proof performance.Use heat exchange pipeline that electrolyzer, water supply installation are carried out temperature regulation, and the hydrogen and the electrolysis water of electrolysis generation carried out heat exchange, controlled the temperature of electrolyzer effectively, improved the operation stability of electrolyzer.
Description of drawings
Fig. 1 is the SPE water electrolysis system structural representation in the embodiment of the invention;
Fig. 2 is second kind of structural representation of SPE water electrolysis system in the embodiment of the invention;
Fig. 3 is the third structural representation of SPE water electrolysis system in the embodiment of the invention;
Fig. 4 is a kind of control method schema of SPE water electrolysis system in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, structure and the mode of operation to the SPE water electrolysis system in the embodiment of the invention describes earlier.In order to make the SPE water electrolysis system be convenient to preparation and repacking, improve its explosion-proof performance simultaneously, in embodiments of the present invention, a kind of structure of SPE water electrolysis system is as shown in Figure 1, comprises water supply installation 3 and electrolyzer 4.Wherein water supply installation 3 is used for supplying water to electrolyzer 4, and stores the water that electrolyzer 4 is discharged.Electrolyzer 4 is used for water electrolysis is produced hydrogen and oxygen, and the gas that produces is carried out elementary gas-liquid separation, discharges moisture wherein.Here the elementary gas-liquid separation of carrying out generally can only be discharged the most of moisture that is blended in hydrogen and the oxygen, if further gas is carried out drying, can use other drying plants.Electrolyzer is an electrolyzer 401.Water supply installation 3 can be from outside electrolysis water and the cooling water introduced of SPE water electrolysis system.Cooling water can be a for example tap water of ortho-water, can be stored in the built-in tank 302 of water supply installation.The electrolysis water then should use the water with higher degree, and for example resistance value is greater than 1M Ω cm.The electrolysis water can be stored in earlier in the built-in tank 301 in the water supply installation, and the water in the built-in tank 301 all passes through the further purification of the water purifier 306 that is provided with in the water supply installation 3 and introduces electrolyzer 401 afterwards again.In electrolyzer 401, an electrolysis water part is electrolyzed to produce and is hydrogen and oxygen, and a part is then drawn, through being used further to electrolysis after the water purifier 306 that is provided with in the water supply installation 3.The water of from electrolyzer 401, drawing also can be temporarily stored in earlier in the built-in tank 301 in the water supply installation.Water purifier 306 can be the anion-cation exchange resin water-purification plant.In the mesolow electrolyzer; The metals ion of the catalyzer on the membrane electrode, the metals ion on the pole plate, connecting joint and the various organism in the pipeline and inorganics all possibly come off, decompose, thereby when introducing electrolyzer, cause the obstruction of Catalytic Layer, the inactivation of catalyzer, the electric conductivity decline of proton film even the consequences such as perforation of proton film; In high pressure electrolysis cell, a plurality of tightness systems and pipeline all possibly adopt the metal species material, more be easy to generate positively charged ion membrane electrode is produced infringement.Use water-purification plant can remove above-mentioned various impurity, thereby play the effect of protection electrolyzer.
Use pipe connection between the electrolysis water water outlet 309 of water supply installation 3 and the electrolysis water water inlet 410 of electrolyzer 4; So the electrolysis water is from 309 outputs of the electrolysis water water outlet of water supply installation 3, be input to electrolyzer 4 from the electrolysis water water inlet 410 of electrolyzer 4.Elementary hydrogen water separator 403 and elementary oxygen water separator 404 can be set in electrolyzer 4; The hydrogen that produces when electrolysis is during through elementary hydrogen water separator 403; Gaseous state that carries in the hydrogen or condensation of liquid water and from 411 outputs of the brine electrolysis water outlet of electrolyzer 4; Through the brine electrolysis water return outlet 310 input water supply installations 3 of pipeline, be stored in the built-in tank 301 from water supply installation 3.Equally, from the oxygen that electrolysis produces, separating the water that obtains can be transported to brine electrolysis water return outlet 310 from brine electrolysis water outlet 411, is stored in then in the built-in tank 301.
In embodiments of the present invention, can water supply installation 3 and electrolyzer 4 be placed the integral sealing structure separately, this integral sealing structure periphery can be provided with pressure relief vent.Under the situation that adopts the integral sealing structure, the equipment of integral sealing inside configuration for example motor then need not to adopt explosion-proof type, helps the cost of the equipment of practicing thrift.If with the front of sealed structure as a whole of the operating panel on the device body of water supply installation 3 and electrolyzer 4, pressure relief vent can be arranged on the top of integral sealing structure or back so, operator's safety when guaranteeing release.Pressure relief vent size and shape can be confirmed according to the size and the shape of unloading pressure protection face.
On the basis of SPE water electrolysis system shown in Figure 1, the SPE water electrolysis system in the embodiment of the invention can also comprise gas-cleaning installation 5, is used for removing the hydrogen of electrolyzer 4 generations and other materials of oxygen, and is as shown in Figure 2.Electrolyzer 4 has hydrogen outlet 408 and oxygen outlet 409, and hydrogen multilevel drying pipe 505 and oxygen multilevel drying pipe 506 can be set in gas-cleaning installation 5.Elementary hydrogen water separator 403 in the process electrolyzer 4 carries out elementary exsiccant hydrogen with elementary oxygen water separator 404 and oxygen obtains further drying at hydrogen multilevel drying pipe 505 and oxygen multilevel drying pipe 506 respectively; Condensate moisture wherein and from condensation-water drain 514 output imports in the built-in tank 301 through the condensing water conduit between gas-cleaning installation 5 and the water supply installation 3.Gas-cleaning installation 5 can place the integral sealing structure equally, and this integral sealing structure has pressure relief vent.
In embodiments of the present invention, water supply installation 3, electrolyzer 4 and gas-cleaning installation 5 can be in the integral sealing structure separately.In addition, can water supply installation 3 and electrolyzer 4 be placed same integral sealing structure, gas-cleaning installation 5 is placed another integral sealing structure; Perhaps, electrolyzer 4 and gas-cleaning installation 5 are placed same integral sealing structure, water supply installation 3 is placed another integral sealing structure.Also can water supply installation 3, electrolyzer 4 and gas-cleaning installation 5 be placed same integral sealing structure in addition.
In Fig. 1 or SPE water electrolysis system shown in Figure 2, can also comprise blow device and electric supply installation.Fig. 3 shows the structure that is provided with gas-cleaning installation 5, blow device 8 and electric supply installation 2, and water supply installation 3, electrolyzer 4 and gas-cleaning installation 5 are in the integral sealing structure separately.In blow device 8, be provided with and purge pressure source 801, purge control module 802 and purge air outlet valve 804,805,806 and 807.For the integral sealing structure at electric supply installation 2, water supply installation 3, electrolyzer 4 and gas-cleaning installation 5 places, be respectively equipped with and purge intake valve 307,406 and 508, and purge air outlet valve 308,407 and 509.Also be provided with in the electric supply installation 2 and purge intake valve 205 and purge air outlet valve 206.Each that purges control module 802 purge air outlet valve respectively with the SPE water electrolysis system in the intake valve that respectively purges be connected, as shown in Figure 3.In addition, if there is two or more devices to be in the same integral sealing structure, for example water supply installation 3 is in the same integral sealing structure with electrolyzer 4, then their shared same purging intake valves and purging air outlet valve.And water supply installation 3, electrolyzer 4, gas-cleaning installation 5 and blow device 6 can place same integral sealing structure.Under this structure, the enforcement of purging is then carried out to integral body simultaneously, and each air outlet valve in the blow device 6 then can be reduced to 1 or several, need not to be provided with in each device to purge intake valve and purge air outlet valve.
With situation shown in Figure 3 is example; After the SPE water electrolysis system brings into operation; Open purging pressure source 801 and purging air outlet valve 804,805,806 and 807 in the blow device 8; And open each device place integral sealing structure the purging intake valve, purge air outlet valve, use to purge the sweeping gas that pressure source 801 produces water supply installation 3, electrolyzer 4, gas-cleaning installation 5 and electric supply installation 2 are purged.Can distribute the sweep gas that purges the pressure source generation to lead to the flow that each purges air outlet valve by purging allocation units 803.Sweeping gas can adopt the stable gases of chemical property such as nitrogen.After purging finishes, close each device place integral sealing structure the purging intake valve, purge air outlet valve.Can close each earlier and purge air outlet valve, close each again and purge intake valve, make each integral sealing inside configuration pressure greater than ambient pressure.
In order to ensure the safety of SPE water electrolysis system, can the using gas concentration sensor etc. proofing unit detect the concentration of inflammable gas in water supply installation 3, electrolyzer 4, gas-cleaning installation 5 and the electric supply installation 2 or four the residing spaces of device.In the production scene of reality, inflammable gas possibly comprise gases such as hydrogen, methane, carbon monoxide.Can choose the suitable proofing unit that is used for detected gas concentration according to concrete gas type.Can in proofing unit, store the set(ting)value of gas concentration, when detecting inflammable gas concentration and reach this set(ting)value, stop corresponding device thereof.Specifically stopping which device, can be preassigned, for example sets when the inflammable gas concentration in the electric supply installation 2 reaches set(ting)value, the operation of stop power supply device 2 and electrolyzer 4.Can in stop control apparatus, preserve this information of setting; And reach the information of set(ting)value about inflammable gas concentration by what the stop control apparatus receiving detection device sent; When so the concentration that detects inflammable gas when proofing unit is in setting range, preassigned device in the SPE water electrolysis system out of service.In addition, continue greater than set(ting)value if detect inflammable gas concentration, and continued the regular hour, this time span also can be arranged in advance and purge in the gear, then starts blow device 8 by purging gear, and corresponding device thereof is purged.Concrete which device that purges also can preestablish and set information is kept in the purging gear.
For electric supply installation 2, its power supply that adopts can also can adopt line voltage for non-line voltages such as wind energy, photovoltaic energy or the wind light mutual complementing energy.This device can adopt two-way or multiple power supplies subsequent use each other and that can drop into automatically, to improve the power supply reliability of SPE water electrolysis system.Comprise Faradaic current follower 203 in the electric supply installation 2, be used for converting alternating-current into meet the requirement of SPE water electrolysis system direct current, for example current density can be 0.3～0.8A/cm
2Can also comprise for example APS follower 204 of other equipment in the electric supply installation 2; Convert the electric energy of external power source into the electric energy form of the equipment claimed in the SPE water electrolysis system, the suitable voltage that for example various water pumps, blower fan, valve, transmitter etc. are required or the direct current or the alternating-current of frequency.The chain control unit of power supply 202 receives the information of stop control apparatus and stops the power supply of related device according to this information.
In the SPE water electrolysis system in embodiments of the present invention, the temperature of electrolyzer can remain on 50～60 ℃, because the electrode heating will make the temperature of electrolyzer be higher than the said temperature scope in electrolytic process, so need carry out temperature regulation to electrolyzer 401.Can make water, hydrogen or oxygen regulate the temperature of electrolyzer 401, in general be that electrolyzer 401 is cooled off.Specifically can adopt the form of electrolyzer inside or external heat-exchanging.Can form heat exchanger channels in electrolyzer 401 machined; Water, hydrogen or oxygen are fed in the heat exchanger channels; Temperature through detecting electrolyzer 401 forms the opening degree that feedback signal is controlled the valve on the heat exchanger channels; Thereby controlled the flow of the heat exchange medium in the heat exchanger channels, reached the purpose of control electrolyzer 401 temperature.The water is here provided by water supply installation 3, specifically can be to come from built-in tank 302.Hydrogen or oxygen use elementary dried hydrogen or oxygen, hydrogen or the oxygen promptly exported from electrolyzer 4.Also can directly control the temperature of promptly regulating electrolyzer 401 by the electrolysis water through the flow of regulating brine electrolysis entering electrolyzer 401 to electrolyzer 401 temperature controlling.As adopt external heat-exchanging, and can again water, hydrogen or oxygen be fed wherein at electrolyzer 4 one-piece construction arranged around heat exchange pipelines, control the temperature of electrolyzer 401 through the flow of regulating the water, hydrogen or the oxygen that feed.
Because the water at SPE water electrolysis system water source is normal temperature, generally be not higher than 25 ℃, so when electrolyzer 401 brings into operation, reach steady state as early as possible, need rising to get into the temperature of the electrolysis water of electrolyzer 401 in order to make it.Can at the SPE water electrolysis system after the electrolysis water is introduced in the outside, earlier it be imported the hydrogen interchanger 501 (being shown among Fig. 2) that is provided with in the gas-cleaning installation 5, utilize the temperature of the heat rising electrolysis water of hydrogen, introduce again in the built-in tank 301.Make the temperature that to control the hydrogen of output in this way.The hydrogen temperature gear can be installed in hydrogen interchanger 501; This device has been adjusted the working order of hydrogen interchanger 501; Specifically can be flow, thereby make the hydrogen temperature of hydrogen interchanger 501 outputs be positioned at preset scope according to hydrogen and/or water in the hydrogen temperature control hydrogen interchanger 501 that detects.In addition, in order to improve the stability of electric tank working, can control the temperature of the electrolysis water of water supply installation 3 outputs.Specifically can water, hydrogen or oxygen be fed the heat exchange that can realize in this pipeline at the outer periphery displacement hot channel of water supply installation 2 with water supply installation 3 integral body.The temperature of water, hydrogen or the oxygen that can feed this moment through adjustment, flow velocity etc. are regulated the heat exchange effect.
In embodiments of the present invention; In gas-cleaning installation 5, be provided with oxygen interchanger 502 (being shown among Fig. 2); For the oxygen that produces in the SPE water electrolysis system; With cooling off in its aerating oxygen interchanger 502, thereby make the further condensation of water vapor in the oxygen improve the purity of oxygen, store oxygen then.Oxygen interchanger 502 can adopt air cooled tube.
SPE water electrolysis system for shown in Figure 3 provides a kind of control method in the embodiment of the invention, its flow process is as shown in Figure 4, and step is following:
Step S41: the concentration that detects inflammable gas in one to four kind of device space of living in water supply installation 3, electrolyzer 4, gas-cleaning installation 5, the electric supply installation 2.Detection in this step can be accomplished through being installed in each gas concentration detection apparatus that installs in the space of living in, and this device should be exported its detected value, is sent to information gathering and steering order treatment unit with wired or wireless mode.
Step S42: detect the gained gas concentration among the determining step S41 and whether be in setting range, if not, then return step S41, proceed to detect, if then get into step S43.
Step S43: preassigned device in the said SPE water electrolysis system out of service.
Can also further after step S43, comprise step S44, the step S45 that is described below, with being shown among Fig. 4.
Step S44: whether the concentration of judging inflammable gas has reached the time span of setting greater than the time that state continued of set(ting)value, if not, then returns step S41, if then get into step S45.
Step S45: start device preset in 8 pairs of SPE water electrolysis systems of blow device and purge.
After purging end, return step S41, proceed to detect.
According to technical scheme of the present invention, adopt modular construction in the SPE water electrolysis system, reduced system complexity, make that this system is easy to realize manufacturing, and help when each module breaks down or be unusual, to carry out localization of fault.The closed structure of each module makes the safety detection of inflammable gas be more prone to accurate, and helps to purge the raising of efficient, thereby has improved explosion-proof performance.Use heat exchange pipeline that electrolyzer, water supply installation are carried out temperature regulation, and the hydrogen and the electrolysis water of electrolysis generation carried out heat exchange, controlled the temperature of electrolyzer effectively, improved the operation stability of electrolyzer.The closed structure of each module makes the safety detection of inflammable gas be more prone to accurate, and helps to purge the raising of efficient, thereby has improved explosion-proof performance.The interior arrangement of each closed structure need not to adopt explosion-proof structure, thereby has reduced equipment cost, and the measures such as interlock control that the while peripheral seal leaves between pressure relief vent, each big module make the water electrolysis system operation safer.The enforcement of all temps control device has guaranteed the stable of inside modules temperature, causes the unavailable or rate of decay quickening of some element when having avoided local temperature too high or too low, thereby has prolonged the work-ing life of system.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. solid polymer electrolyte SPE water electrolysis system; It is characterized in that; Comprise water supply installation and electrolyzer; And this water supply installation and electrolyzer are in the integral sealing structure separately respectively or place same integral sealing structure, and wherein, said integral sealing structure is with pressure relief vent outward:
Water supply installation is used for through self electrolysis water water outlet to the electrolysis water water inlet of electrolyzer supply electrolysis water, and receives and store the water that said electrolyzer is discharged from self brine electrolysis water outlet through self condensate return mouth;
Electrolyzer is used under power supply state, said electrolysis water being carried out the moisture that electrolysis produces hydrogen and oxygen and discharges said hydrogen and oxygen;
Blow device is used in said integral sealing structure, feeding sweeping gas;
Electric supply installation, the electric energy formal transformation that is used for SPE water electrolysis system power supply is to meet the required electric energy form of said SPE water electrolysis system;
Heat exchange pipeline, it is inner or peripheral to be arranged at said electrolyzer, is used to feed the water that provided by water supply installation and the hydrogen or the oxygen of electrolyzer output;
Heat-exchanger rig is arranged at the inside or the periphery of said water supply installation, is used for water supply installation and extraneous heat exchange, and heat transferring medium is the water that provides of water supply installation and the hydrogen or the oxygen of electrolyzer output.
2. SPE water electrolysis system according to claim 1 is characterized in that, further comprises gas-cleaning installation, is used to purify hydrogen and the oxygen that said electrolyzer produces.
3. SPE water electrolysis system according to claim 2 is characterized in that, is provided with condensing water conduit between said gas-cleaning installation and the said water supply installation, is used for the water that hydrogen and/or oxygen condensation obtain is imported said water supply installation;
And comprise water correction plant in the said water supply installation, the water that is used for that said condensation is obtained purifies and becomes the electrolysis water.
4. SPE water electrolysis system according to claim 2 is characterized in that, said water supply installation, electrolyzer and gas-cleaning installation are in respectively in the integral sealing structure separately;
Perhaps said water supply installation and said electrolyzer are in the same integral sealing structure, and said gas-cleaning installation is in another integral sealing structure;
Perhaps said electrolyzer and said gas-cleaning installation are in the same integral sealing structure, and said water supply installation is in another integral sealing structure.
5. SPE water electrolysis system according to claim 2 is characterized in that, said water supply installation, electrolyzer, gas-cleaning installation and blow device are in the same integral sealing structure, and said electric supply installation is in another integral sealing structure;
Perhaps said water supply installation, electrolyzer, gas-cleaning installation, blow device and electric supply installation are in respectively in the integral sealing structure separately.
6. SPE water electrolysis system according to claim 3 is characterized in that, said gas-cleaning installation is further used for the heat exchange between the hydrogen that electrolysis water and electrolysis produce.
7. SPE water electrolysis system according to claim 3 is characterized in that, said gas-cleaning installation is further used for improving the purity of the oxygen that electrolysis produces.
8. SPE water electrolysis system according to claim 2 is characterized in that, further comprises proofing unit and stop control apparatus, wherein,
Said proofing unit is used for detecting the concentration of inflammable gas in one to four kind of device space of living in of said water supply installation, electrolyzer, gas-cleaning installation, electric supply installation;
Said stop control apparatus is used for when concentration that said proofing unit detects inflammable gas is in setting range preassigned device in the said SPE water electrolysis system out of service.
9. SPE water electrolysis system according to claim 8; It is characterized in that; Further comprise the purging gear; The concentration that is used for detecting inflammable gas when said proofing unit has reached the time span of setting greater than the time of set(ting)value and this state continuance, starts said blow device device preset in the said SPE water electrolysis system is purged.
10. a control method is applied to it is characterized in that in the described SPE water electrolysis system of claim 2, comprises the steps:
Detect the concentration of inflammable gas in one to four kind of device space of living in water supply installation, electrolyzer, gas-cleaning installation, the electric supply installation;
When the concentration of affirmation inflammable gas is in setting range, preassigned device in the said SPE water electrolysis system out of service.
11. method according to claim 10; It is characterized in that; Further comprise: the concentration of affirmation inflammable gas has reached the time span of setting greater than the time of set(ting)value and this state continuance, starts said blow device device preset in the said SPE water electrolysis system is purged.
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